JP3011216B1 - Formwork concrete block earthquake-resistant wall and its construction method - Google Patents

Abstract

An object of the present invention is to construct an earthquake-resistant wall for an existing structure using a formwork concrete block. SOLUTION: A formwork concrete block arranged in at least a part of a section in the height direction of the earthquake-resistant wall 1 includes:
A divided formwork concrete block 3 in which the formwork concrete block 2 is divided in the length direction of the earthquake-resistant wall 1 is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-resistant wall using a formwork concrete block and a method for constructing the same.

[0002]

2. Description of the Related Art When a new structure is constructed, a seismic wall using a formwork concrete block has a structure in which columns and beams are not provided on both sides and an upper part of the seismic wall. Because it can be constructed, for example, after connecting the lower stairs to the skeleton and arranging the vertical streaks in advance, it is completed by stacking the formwork concrete blocks while arranging the horizontal streaks and filling the interior with mortar or concrete But,
When constructing a new earthquake-resistant wall for an existing structure, there are frames on both sides and the upper part, so it is not possible to construct the earthquake-resistant wall in the same operation as when constructing a new structure.

[0003] Since form concrete blocks need to be stacked through vertical bars in the opening formed by the face shell and web shell, it is necessary to precede the vertical bars with the frame on both sides and the top. , The formwork concrete blocks could not be stacked up to the upper floor skeleton,
If you precede the stacking of formwork concrete blocks,
Vertical bars cannot be arranged.

[0004] Even if the vertical streak is vertically divided and the construction section is divided in the height direction, if one of the work of arranging the vertical streaks and stacking the formwork concrete block is performed first,
Since the other work cannot be performed, the longitudinal bars must be finally divided in formwork concrete blocks.

[0005] In view of the above background, the present invention proposes a formwork concrete block earthquake-resistant wall capable of constructing an earthquake-resistant wall using a formwork concrete block for an existing structure, and a method of constructing the same.

[0006]

SUMMARY OF THE INVENTION In the present invention, a formwork concrete block disposed at least in a part of the height direction of a shear-resistant wall is divided in the longitudinal direction of the shear-resistant wall so that both sides and an upper portion are formed. Even when there is a skeleton, it is possible to stack the formwork concrete blocks up to the skeleton on the upper floor while passing the vertical streaks through the openings between the web shells.

[0007] One formwork concrete block is composed of two face shells facing each other and usually two web shells connecting the face shells, and the vertical streaks pass through openings formed between the two web shells. If the vertical bars are laid in advance, the form concrete blocks must be dropped and installed from above, and if the form concrete blocks are stacked in advance. If it does, the vertical streaks must be dropped from above to arrange them.

Therefore, in each case, a space having a height corresponding to the height of the formwork concrete block to be constructed later or the length of the vertical streak is required above the construction section.
If there is a frame at the top, that space cannot be secured.

[0009] On the other hand, if the form concrete block is divided in the longitudinal direction of the earthquake-resistant wall, it is equivalent to opening both face shell sides of the space formed by the face shell and the web shell. Therefore, when vertical bars are laid in advance, the concrete block can be installed while inserting the formwork concrete block in the direction of the wall thickness of the earthquake-resistant wall with respect to the vertical bars, and the formwork concrete block is placed first If it is, it can be constructed by inserting vertical streaks into the formwork concrete block in the direction of the wall thickness, and in any case, at least the formwork concrete, It is not necessary to secure a space having a height corresponding to the height of the block.

A divided formwork concrete block in which a formwork concrete block is divided in the length direction of the earthquake-resistant wall is provided with an anti-seismic structure in at least a part of the height direction of the earthquake-resistant wall. While being arranged in the length direction of the wall, they are stacked in the height direction to form a seismic wall.

As described above, since there is no interference between the split formwork concrete block and the vertical form when the split form concrete block or the vertical form is installed, the arrangement of the vertical form reinforcement and the division form concrete block are stacked. Before and after does not matter.

[0012] The split formwork concrete block can also be used over the entire height of the shear wall, in which case
Stacking of split form concrete blocks while arranging vertical bars of the length spanning the entire height of the earthquake-resistant wall, and arranging horizontal bars,
Filling with mortar or concrete completes the shear wall.

[0013] In this case, the work required for stacking the divided formwork concrete blocks is twice as much as the work required for stacking the undivided formwork concrete blocks. If the section is divided into two in the height direction and the divided formwork concrete block is used for the upper section, the number of stacking operations can be reduced.

[0014] In the case of the second aspect, in the lower section, a lower vertical streak having a length corresponding to a part of the total height of the earthquake-resistant wall is connected to the lower-floor skeleton and arranged, and While arranging horizontal streaks on the skeleton, work is performed to stack the formwork concrete blocks to the height of the middle part of the shear wall in the height direction.

The filling of the mortar or concrete into the formwork concrete block may be performed when the lower formwork concrete block is stacked as described in claim 3.

In the case of claim 2 or claim 3, after stacking the formwork concrete blocks up to the height of the middle portion in the height direction of the earthquake-resistant wall, the remaining section of the partial section of the total height of the earthquake-resistant wall The upper vertical streaks of a length corresponding to the upper floor are connected to the skeleton of the upper floor and the lower vertical streaks and arranged, and the split formwork concrete blocks are arranged on the formwork concrete blocks while the horizontal streaks are arranged. Work to stack up to the frame is performed, and then the mortar or concrete is filled up to the uppermost divided form concrete block to complete the earthquake-resistant wall.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, the invention of claim 1 includes a form concrete block (hereinafter, referred to as FIG. 4- (a)) shown in FIG. While the formwork block) 2 is divided in the length direction of the earthquake-resistant wall 1, the divided formwork concrete blocks (hereinafter referred to as “divided blocks”) 3 as shown in FIG. Earthquake-resistant wall 1 built up in height direction
It is.

The divided block 3 is formed by cutting an intermediate portion of the face shells 2a, 2a in the longitudinal direction of the form block 2 in the height direction so that the form block 2 is divided into two parts. The web shells 2b, 2b are separated into divided blocks 3, 3. The divided block 3 may be used over the entire height of the earthquake-resistant wall 1, or may be used only in a partial upper section as shown in FIG.

According to the second and third aspects of the present invention, the form-block 2 is used in a section below the earthquake-resistant wall 1 and the divided block 3 is used in the section above the earthquake-resistant wall 1. Is the way.

The construction procedure when the construction section of the earthquake-resistant wall 1 is divided into two in the height direction will be described with reference to FIGS. 1 (a) to 1 (f).
In the drawing, the frame 4 on the lower floor, such as beams and slabs of the existing structure,
The case where the earthquake-resistant wall 1 is newly constructed between the building 5 on the upper floor and the building 5 on the upper floor is shown in the case of constructing a new structure. It is constructed even without the frames 6, 6 on both sides.

Further, in FIG. 1, the construction section is divided into two at a half height from the lower frame 4 to the upper frame 5, but the division position and the number of divisions of the construction section will be described later. Streak 8
It is determined arbitrarily since it is determined based on the length of the upper vertical streaks 11, the length of each bar, the ease of arrangement of each bar, the ease of stacking the form blocks 2 and the divided blocks 3, and the like.

First, as shown in (a), an anchor bar 7 is protruded from the frame 4 on the lower floor, and a lower vertical bar 8 having a length corresponding to a part of the total height of the earthquake-resistant wall 1 is anchored. They are connected to each other by binding to the streaks 7 and arranged. At this time, at the position of the lower end of the earthquake-resistant wall 1 and the position of both ends in the longitudinal direction, the anti-split bar 9 for preventing splitting and breaking of the mortar 13 and concrete is tied to the anchor bar 7 and the lower vertical bar 8, for example. Arrange the reinforcing bars in the thickness direction of the earthquake-resistant wall 1.

Anchor bars 7 are used for the frames 4, 5 of the existing structure.
For 6, for example, it is inserted into a hole formed in the skeleton, and is fixed to the skeleton by a filler such as mortar filled in the hole. It doesn't matter.

In the drawing, the anchor bars 7 are also projected from the upper frame 5 at the stage (a). What is necessary is that it is performed by the time of arrangement.

As shown in FIG.
Are also protruded from the skeletons 6 and 6 on both sides such as columns and load-bearing walls located on both sides in the length direction. However, since the anchor bars 7 on both sides in the length direction are connected to the horizontal bars 10, the formwork block is formed. What is necessary is just to protrude from the frame 6 at the time of arranging the horizontal streak 10 which is laid every time the 2 or the divided block 3 is stacked one step.

In the case of FIG. 1, when all the form blocks 2 are stacked up to half the height of the earthquake-resistant wall 1 as shown in FIG.
Since a sufficient distance is provided between the upper surface of the uppermost form block 2 and the lower surface of the frame 5 on the upper floor, the lower vertical line 8 can be dropped. It is not necessary to arrange the reinforcing bars, and only some of the lower vertical streaks 8 may be arranged due to the workability of stacking the form blocks 2.

In this case, the connection between the remaining lower longitudinal bars 8 arranged after the stacking of all the form blocks 2 and the anchor bars 7 projecting from the frame 4 on the lower floor is made by connecting the lowermost form blocks 2. In addition, it can be performed by using the form block 2 having the opening 2c in the face shell 2a.

If the form block 2 having an opening 2c is used in a part of the form blocks 2 of the entire form blocks 2 arranged at the lowermost stage, the mortar 13 or concrete dropped into the form block 2 can be used. Can be cleaned, and the filling property of the mortar 13 and concrete is improved.

After arranging the lower longitudinal bars 8, as shown in (a) and (b), the formwork while arranging the horizontal bars 10 below the upper end of the lower vertical bars 8 on the frame 4 on the lower floor. Stack up block 2. The horizontal streaks 10 are arranged every time the formwork blocks 2 are stacked one level,
Both ends of the horizontal bar 10 are anchor bars 7 projecting from the frame 6 on both sides.
Are connected by means such as binding.

The form blocks 2 are stacked until the exposed length from the uppermost form block 2 at the upper end of the lower longitudinal line 8 is short enough to connect with the upper longitudinal line 11. Then, as shown in (b) and (c), the funnel 12 is attached to the form block 2 located at the uppermost stage of the form block 2 stacked to half the height of the earthquake-resistant wall 1, and the mold is formed through the funnel 12. The frame block 2 is filled with a non-shrinkable mortar 13 or concrete. The mortar 13 and the concrete need not always be filled at this stage, but may be filled at once after the divided blocks 3 are stacked up to the upper end of the earthquake-resistant wall 1.

After that, the upper longitudinal bar 11 is connected to the lower longitudinal bar 8 and the anchor bar 7 projecting from the frame 5 on the upper floor by binding or the like, and arranged. Upper vertical bar 11 is the top form block 2
From the upper end to the lower surface of the frame 5 on the upper floor.

After the arrangement of the upper vertical bars 11, the divided blocks 3 are placed on the form blocks 2 up to the skeleton 5 on the upper floor as shown in FIG.
Anchor bars 7 protrude from the skeletons 6 on both sides, and horizontal bars 10
Pile up while arranging. Before stacking the uppermost divided block 3, as shown in (e), the anti-split bar 9 is arranged by binding it to the anchor bar 7 or the upper vertical bar 11 of the skeleton 5 on the upper floor.

A part of the lowermost divided block 3 on the form block 2 may be a divided block 3 having an opening 3a for the same reason as the lowermost form block 2. In some cases, a divided block 3 having no opening 3a is used.

After stacking the uppermost divided block 3,
Mortar 13 or concrete is filled from the uppermost form block 2 to the uppermost divided block 3. When the upper end of the uppermost divided block 3 abuts against the lower surface of the upper frame 5, one of the divided blocks 3 installed on the uppermost floor has an opening in the face shell to secure a filling port for mortar 13 or the like. A dividing block 3 having 3a is used, and a funnel 12 is attached to the opening 3a.

The distance from the upper surface of the lower frame 4 to the lower surface of the upper frame 5 does not become an integral multiple of the height of the form block 2 or the divided block 3, and is different from the upper end of the uppermost divided block 3. If there is a gap between the upper floor and the lower surface of the skeleton 5, the space between the uppermost divided block 3 and the upper skeleton 5 is filled with mortar 13 or concrete.

In this case, as shown in (d) and (e), molds 14 and 14 are arranged on both sides of the divided block 3, and a funnel 12 is attached to a part of one mold 14. After the molds 14 and 14 are released, the mortar 13 and the concrete in the funnel 12 are cut off and repaired as shown in FIG.

[0037]

According to the present invention, a divided formwork concrete in which a formwork concrete block is divided in a longitudinal direction of the earthquake-resistant wall is provided in a formwork concrete block arranged at least in a part of a section in the height direction of the earthquake-resistant wall. To use blocks,
Even when there is a frame on both sides and the top, it is possible to stack form concrete blocks while passing vertical bars through the openings between the web shells up to the frame on the upper floor, and using the form concrete blocks for existing structures You can build a shear wall.

According to the second and third aspects, the construction section of the earthquake-resistant wall is divided into two sections in the height direction, and the divided section concrete block is used for the upper section. The working time when constructing the earthquake-resistant wall using the frame concrete block can be minimized.

[Brief description of the drawings]

1 (a) to 1 (f) are longitudinal sectional views showing a construction procedure of a shear wall.

FIG. 2 is an elevation view showing a configuration example of a shear wall.

FIG. 3 is a cross-sectional view showing a state in which formwork concrete blocks are stacked.

FIG. 4 (a) is a perspective view showing a formwork concrete block, and FIG. 4 (b) is a perspective view showing a split formwork concrete block.

[Explanation of symbols]

1 ... earthquake-resistant wall, 2 ... form concrete block, 2a ...
… Face shell, 2b …… web shell, 2c …… opening,
3 ... divided formwork concrete block, 3a ... opening, 4
... Lower frame, 5 Upper frame, 6 Frames on both sides, 7 Anchor bar, 8 Lower vertical bar, 9 Splitting bar, 10 Horizontal bar, 11 Upper vertical streak, 12 ... funnel, 13 ...
... mortar, 14 ... formwork.

────────────────────────────────────────────────── ─── Continuing from the front page Application for Article 30 (1) of the Patent Act has been filed. Published in Chemical Daily (November 25, 1998) published by Chemical Daily. Applied for the application of Article 30 (1) of the Patent Act Denki Shimbun (November 25, 1998) Published in the Newspaper Division of the NEC Association. (72) Inventor Tatsumi Morishita 4-51, Ota-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture, Kashima Construction Co., Ltd.Yokohama Branch Inside the research laboratory (72) Inventor Yasushi Akiyama 2-191-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Corporation Technical Research Laboratory (56) References JP-A-9-144374 (JP, A) JP-A-9-228653 (JP, A) JP-A-10-159214 (JP, A) JP-A-10-159350 (JP, A) JP-A-10-292639 (JP, A) JP-A-11-13291 (JP, A) JP-A-11-71907 (JP, A) Patent 2914131 (JP, B2) JP-B-57-12832 (JP, B2) JP-B-6-23458 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 2/56 642 E04B 2/56 643 E04G 23/02

Claims (3)

(57) [Claims] 1. A concrete block is piled up while arranging a vertical bar between a lower frame and an upper frame, and arranging a horizontal bar on the lower frame. Mortar or concrete filled with concrete, and at least a part of the section in the height direction of the earthquake-resistant wall, the formwork concrete block is divided in the length direction of the earthquake-resistant wall. Formwork concrete block earthquake-resistant walls stacked in the height direction while arranging split formwork concrete blocks in the length direction of the earthquake-resistant wall. 2. A form concrete block is piled up while arranging a vertical bar between a lower frame and an upper frame, and arranging a horizontal bar on the lower frame. Is a method of constructing an earthquake-resistant wall constructed by filling mortar or concrete into the building.The lower vertical streaks corresponding to some sections of the total height of the earthquake-resistant wall are connected to the lower-floor skeleton. After stacking the formwork concrete blocks to the height of the middle part in the height direction of the shear-resistant wall while arranging the horizontal streaks on the lower-floor skeleton, the remaining part of the section The upper vertical streak of the length corresponding to the section is connected to the upper frame and the lower vertical streak and arranged,
The divided formwork concrete blocks in the form in which the formwork concrete blocks are divided in the length direction of the earthquake-resistant wall are stacked up to the upper floor skeleton while arranging horizontal bars on the formwork concrete blocks, and the uppermost divided formwork concrete Construction method of formwork concrete block earthquake-resistant wall to fill mortar or concrete up to block. 3. The formwork concrete block according to claim 2, wherein the concrete block is filled with mortar or concrete when the formwork concrete block is stacked up to the height of the middle part in the height direction of the earthquake-resistant wall. Construction method.